强化应力及预强化处理对平板焊接残余应力的影响  

Influence of Strengthening Stress and Pre-stretching on Welding Residual Stress

作　　者：张起侨[1,2] 陈学东[1,2] 韩豫[3] 

机构地区：[1]浙江工业大学化工机械设计研究所,浙江杭州310032 [2]合肥通用机械研究院,安徽合肥230031 [3]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《压力容器》2011年第10期9-14,共6页Pressure Vessel Technology

基　　金：国家高技术研究发展计划重点资助项目(863计划;2009AA044802)

摘　　要：根据06Cr19Ni10奥氏体不锈钢材料的室温拉伸试验结果,采用ANSYS有限元软件对不同屈服强度下平板焊接过程及焊后强化过程进行了数值模拟分析。结果表明,焊后强化并不能完全消除焊接残余应力,但可以显著改善焊接残余应力的分布;对不同强化工艺下平板的焊接残余应力进行比较,指出对材料进行预强化处理更有利于改善焊接残余应力。模拟分析结果可为应变强化工艺参数筛选提供一定的参考。According to the resuh of uniaxial tensile test for austenitic stainless steel under room temperature, the welding process and strengthening process after welding were numerically simulated in the different yield strength. The results show that the welding residual stress can not be completely removed by cold stretching, but it will be significantly improved. Comparing welding residual stress in the different cold stretching process, it is pointed that the pre -stretching will be more helpful for improving the weld- ing residual stress. The simulated results can provide some reference for cold stretching process.

关 键 词：奥氏体不锈钢 焊接残余应力 数值模拟 强化应力 预强化处理 

分 类 号：TH49[机械工程—机械制造及自动化] TG142.25[一般工业技术—材料科学与工程]